*** This file runs regressions to generate estimates of average effects across different specifications
*** Here we use the CEP policy categories and 2019 as the post period
*** KeepSwitcher States. Least-Skilled Treated Group
*** Only specifications with no time-varying covariates.




capture log close 
clear all
set more off
set trace off

* If needed change global path to point to directory where files are stored on your computer
*global path "I:/DataSets5/Duncan/Dropbox/Recent Minimum Wage Changes/2020.12 NBER Update/JOLE Precommittment Replication"
global dtadir "$path/Data"
global tabdir "$path/Tables"
global figdir "$path/Figures"
global estdir "$path/Estimates"
global logdir "$path/Logfiles"


log using "$logdir/boot-ow-mw-cep-lowskill-switchers-2019-2019-no-covars.log", replace


*Set seed
set seed 123456

* 2) Define bootstrap program for stratified sampling
capture program drop bs_strat
program define bs_strat, rclass

	*------------------------ 1.1 Syntax -------------------------- 

	syntax, postmin(real) categories(string) sample(string) switchers(string)

	
	*------------------------ 1.2 Set Up -------------------------- 
	
	* Get labels for sampled states 
	labmask stateid, values(statefip) decode
	
	tab stateid policygroup	
	
	*------------------------ 1.3 DD Regression Hourly and Minimum Wages --------------------------  	

	* CPS Regressions Own wage
	reghdfe hourwage i.StatIncreaserLarge##i.post i.StatIncreaserSmall##i.post i.indexer##i.post [aw=earnwt] if lowskill == 1 & cps == 1, absorb(i.month##i.year i.stateid) cluster(stateid) compact
	gen ow_beta_cps_large1=(_b[1.StatIncreaserLarge#1.post])
	gen ow_beta_cps_small1=(_b[1.StatIncreaserSmall#1.post])
	gen ow_beta_cps_index1=(_b[1.indexer#1.post])
	
	reghdfe hourwage i.StatIncreaserLarge##i.post i.StatIncreaserSmall##i.post i.indexer##i.post [aw=earnwt] if lowskill == 1 & cps == 1, absorb(i.month##i.year i.stateid i.age i.educ) cluster(stateid) compact
	gen ow_beta_cps_large5=(_b[1.StatIncreaserLarge#1.post])
	gen ow_beta_cps_small5=(_b[1.StatIncreaserSmall#1.post]) 
	gen ow_beta_cps_index5=(_b[1.indexer#1.post])

	* CPS Regressions Effective Minimum Wage 
	reghdfe effectiveminwage i.StatIncreaserLarge##i.post i.StatIncreaserSmall##i.post i.indexer##i.post [aw=perwt] if lowskill == 1 & cps == 1, absorb(i.month##i.year i.stateid) cluster(stateid) compact
	gen mw_beta_cps_large1=(_b[1.StatIncreaserLarge#1.post])
	gen mw_beta_cps_small1=(_b[1.StatIncreaserSmall#1.post])
	gen mw_beta_cps_index1=(_b[1.indexer#1.post])

	reghdfe effectiveminwage i.StatIncreaserLarge##i.post i.StatIncreaserSmall##i.post i.indexer##i.post [aw=perwt] if lowskill == 1 & cps == 1, absorb(i.month##i.year i.stateid i.age i.educ) cluster(stateid) compact
	gen mw_beta_cps_large5=(_b[1.StatIncreaserLarge#1.post])
	gen mw_beta_cps_small5=(_b[1.StatIncreaserSmall#1.post]) 
	gen mw_beta_cps_index5=(_b[1.indexer#1.post])
	
	* Average coefficients across models and store as scalar for each bootstrap replication
	
	* All samples
	egen ow_beta_all = rowmean(ow_beta_cps*)
	egen ow_beta_large = rowmean(ow_beta_cps_large*)
	egen ow_beta_small = rowmean(ow_beta_cps_small*)
	egen ow_beta_indexer = rowmean(ow_beta_cps_index*)
	
	egen mw_beta_all = rowmean(mw_beta_cps*)
	egen mw_beta_large = rowmean(mw_beta_cps_large*)
	egen mw_beta_small = rowmean(mw_beta_cps_small*)
	egen mw_beta_indexer = rowmean(mw_beta_cps_index*)
	
	* Return means as scalars
	foreach var of varlist ow_beta_all-mw_beta_indexer {
		sum `var', meanonly
		return scalar mean_`var' = r(mean)
	}
	
	* Drop created variables
	drop ow_beta* mw_beta*

end
				   


*****************************************************************************************************
************					   3. Set up data							            ************
***************************************************************************************************** 


*** Assemble relevant years of the basic monthly CPS
use "$dtadir/CPS-2019.dta", clear

drop if year < 2011

*** Drop seniors
drop if age >= 65 | age < 16
drop if empstat == 0

*** Construct economic outcomes of interest 

* if empstat = 10: "At work"
* if empstat = 12: "employed, not at work last week

gen employed = 0
replace employed = 1 if  empstat == 10 |  empstat == 12

*** Assume that armed forces are employed
replace employed = 1 if empstat == 1

**** Construct education variables
gen dropout = 0 
replace dropout = 1 if educ < 73
gen highschool = 0 
replace highschool = 1 if educ == 73
gen somecollege = 0
replace somecollege = 1 if educ >= 81 & educ <= 92
gen collegeplus = 0
replace collegeplus = 1 if educ >= 111

gen quarter = 1 if inlist(month,1,2,3)
replace quarter = 2 if inlist(month,4,5,6)
replace quarter = 3 if inlist(month,7,8,9)
replace quarter = 4 if inlist(month,10,11,12)

gen time = (100*year) + month

*** Merge in HPI data
merge m:1 statefip year quarter using "$dtadir/HPI_2019.dta"
drop if _merge == 2
drop _merge

replace HPI = HPI/1000

*** Merge in personal income data
merge m:1 statefip year quarter using "$dtadir/PersonalIncome_2019.dta"
gen lnPersonalIncome = ln(PersonalIncome)
drop if _merge == 2
drop _merge

** creates mid-skill employment rate 
gen group = 0 
replace group = 1 if (age <= 30 & age > 21 & highschool == 1) | (age > 30 & age <= 45 & dropout == 1) | (age > 45 & age < 65 & dropout == 1) 

egen stateempD = mean(employed) if group == 1, by(year month statefip) 
egen stateempE = max(stateempD), by(year month statefip) 

gen lowskill = 0 
replace lowskill = 1 if inrange(age,16,25) & dropout == 1

gen young = 0 
replace young = 1 if inrange(age,16,21)

gen primeage = 0
replace primeage = 1 if inrange(age,26,54)

keep if lowskill == 1

*** Generate indicators if receive tips/overtime, paid hourly, or have wage rates imputed
gen tippedorovertime = otpay == 2
gen hourly = paidhour == 2 
gen notimputed = qhourwag == 0 
gen notimputedB = (qhourwag == 0 & qearnwee == 0)

*** Keep only people eligible for the ORG sample for hourly wage regressions
replace hourwage =. if eligorg != 1

*** Keep only people are employed for hourly wage regressions
replace hourwage =. if employed != 1

*** Keep only people paid by the hour for hourly wage regressions
replace hourwage =. if hourly != 1

*** Keep only people who do not have imputed wage rates for hourly wage regressions
replace hourwage =. if notimputed != 1

* Adjust NIU cases for hourly wages for hourly wage regressions
replace hourwage =. if hourwage == 999.99

gen acs = 0
gen cps = 1

gen perwt = wtfinl

keep hourwage year month statefip lnPersonalIncome HPI time educ age stateempE lowskill acs cps perwt earnwt

compress

* generate post variable 
cap drop post 
gen post = 0 if inrange(year,2011,2013) 
replace post = 1 if inrange(year,2019,2019)

* Keep only needed observations to reduce memory
drop if missing(post)
keep if lowskill == 1


* merge in policy categories 
cap drop originaltype-increase5 
merge m:1 statefip using "$dtadir/min_wage_variables_for_ACS_and_CPS_analysis.dta", nogen keepusing(originaltype jan*min) 

cap drop indexer StatIncreaserLarge StatIncreaserSmall statutoryincreasein2014or2015 statutoryincreasein2014to2017 statutoryincreasein2014to2018

gen indexer = 0 
gen StatIncreaserLarge = 0 
gen StatIncreaserSmall = 0 
gen statutoryincreasein2014or2015 = 0
gen statutoryincreasein2014to2018 = 0

* CEP Categories
replace indexer = 1 if originaltype == "Indexer" 
replace statutoryincreasein2014or2015 = 1 if (jan2016min - jan2013min) > 0 & indexer == 0 
replace StatIncreaserLarge = 1 if indexer == 0 & (jan2015min - jan2013min) >= 1 & (jan2016min - jan2013min) != . 
replace StatIncreaserSmall = 1 if indexer == 0 & statutoryincreasein2014or2015 == 1 & StatIncreaserLarge == 0 

* Generate January minimum wage variable
gen effectiveminwage =.
forvalues i=2011/2019 {
	replace effectiveminwage = jan`i'min if year == `i'
}

* Take ln of hourly and minimum wages
gen ln_hourwage = ln(hourwage)
gen ln_effectiveminwage = ln(effectiveminwage)

* Generate policygroup variable for doing proportional sampling correctly
gen policygroup = 1
replace policygroup = 2 if indexer == 1
replace policygroup = 3 if StatIncreaserSmall == 1
replace policygroup = 4 if StatIncreaserLarge == 1

compress


cd "$estdir/Bootstrap/no-tvc"

timer clear
timer on 1

* Run bootstrap command for stratified sampling for all means, ACS means, and CPS means for all changer states, large increasers, small increasers, and indexers.

* Policy categories: cep. Sample: lowskill. Switcher states: switchers. Post start: 2019 post end: 2019.
bootstrap ow_beta_allchange=r(mean_ow_beta_all) ow_beta_large=r(mean_ow_beta_large) ow_beta_small=r(mean_ow_beta_small) ow_beta_index=r(mean_ow_beta_indexer) ///
mw_beta_allchange=r(mean_mw_beta_all) mw_beta_large=r(mean_mw_beta_large) mw_beta_small=r(mean_mw_beta_small) mw_beta_index=r(mean_mw_beta_indexer), ///
rep(100) cluster(statefip) strata(policygroup) idcluster(stateid) saving("boot-ow-mw-cep-lowskill-switchers-2019-2019", replace): bs_strat, postmin(2019) categories(cep) sample(lowskill) switchers(switchers)

* Display all bootstrap statistics
*estat bootstrap, all

* Save data from original call with data as is.
mat res = r(table) 
svmat res, names(col)
gen stat = ""
gen n = _n
replace stat = "beta" if n == 1
replace stat = "boot_se" if n == 2
replace stat = "z-score" if n == 3
replace stat = "pval" if n == 4
replace stat = "lo_ci" if n == 5
replace stat = "hi_ci" if n == 6

keep ow_beta_allchange-stat

* Add labels to bootstrap code sample
cap drop policycat sample switchers postmin postmax
gen policycat = "cep"
gen sample = "lowskill"
gen switchers = "switchers"
gen postmin = 2019
gen postmax = 2019

drop if missing(stat)

save "$estdir/Bootstrap/no-tvc/coef-ow-mw-cep-lowskill-switchers-2019-2019.dta", replace


* Add labels to bootstrap code sample
use "boot-ow-mw-cep-lowskill-switchers-2019-2019.dta", clear
cap drop policycat sample switchers postmin postmax
gen policycat = "cep"
gen sample = "lowskill"
gen switchers = "switchers"
gen postmin = 2019
gen postmax = 2019
gen iteration = _n

label var ow_beta_allchange "Own Wage Estimate All Changers"
label var ow_beta_large "Own Wage Estimate Large Increasers"
label var ow_beta_small "Own Wage Estimate Small Increasers"
label var ow_beta_index "Own Wage Estimate Indexers"

label var mw_beta_allchange "Min Wage Estimate All Changers"
label var mw_beta_large "Min Wage Estimate Large Increasers"
label var mw_beta_small "Min Wage Estimate Small Increasers"
label var mw_beta_index "Min Wage Estimate Indexers"

save "$estdir/Bootstrap/no-tvc/boot-ow-mw-cep-lowskill-switchers-2019-2019.dta", replace

di "Policy categories: cep. Sample: lowskill. Switcher states: switchers. Post start: 2019 post end: 2019. Done" 


timer off 1
timer list 1
log close

